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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 265-285 days






2. 19-23 (21) days






3. Birthing process (termination of gestation)






4. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






5. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






6. Start of the reproductive tract for the female. located outside of the body






7. (switzerland) 2nd in size and milk production - most muscle -






8. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






9. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






10. Way to know everything is alright with the breeding male






11. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.


12. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






13. Days which have decreasing daylight hours


14. Prevent the cow from getting an infection from the calve






15. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






16. 1. brain function - 2. blood flow - 3. willing female






17. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






18. 30-38 hours after estrus cycle begins






19. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






20. When are dairy cattle dehorned?






21. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






22. Failure to have both testis (gonads) descend






23. What about the sperm for a bull which has been castrated but still has testicles?






24. Duct through penis that carries sperm and urine






25. Milk ~305 days - dry 60 days prior to calving






26. Provide nourishment for the developing sperm






27. 1-3 days






28. 283 days






29. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






30. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






31. Start of the reproductive tract for the female. located outside of the body






32. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






33. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






34. When are steers and heifers weaned from bottle feeding?






35. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






36. Actual heat cycle (period)






37. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






38. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






39. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






40. Animal which has been castrated after puberty






41. 26 hours after estrus begins






42. (switzerland) 2nd in size and milk production - most muscle -






43. ~305 days (altough often longer due to breeding difficulties)






44. Animals which have only one estrous cycle (ex: dog - fox)






45. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






46. ~60 days before calving






47. Prevent the cow from getting an infection from the calve






48. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






49. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






50. 1-2 days